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Picture recorder/reproducer and method thereof

a technology of picture recorder and recorder, which is applied in the field of picture recorder/reproducer, can solve the problems of no patent application in which improvement is tried, stream data without sequence header not normally reproduced, noise,

Inactive Publication Date: 2005-10-04
RPX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention allows for smooth reproduction of stream data used for digital broadcasting and others. It achieves this by analyzing received stream data and writing the data to storage means with a sequence header that includes image format information required to reproduce the data immediately after a recording initiation command. The recorded stream data can then be read and images and voice can be reproduced without delay. The use of an FIFO memory also ensures that data acquired by recording stream data can be smoothly reproduced without loss.

Problems solved by technology

Therefore, in a conventional type recording / reproducing method, it is also possible to record stream data before the sequence header in a storage device since the recording of stream data is started at arbitrary time at which a user tries to record it, however, stream data without the sequence header is not normally reproduced and becomes noise.
Further, as stream data without a sequence header is also read as recorded data in reproducing, time loss occurs until data after a sequence header is output as normal video / voice data.
Hei 11-69308 for example), however, there is no patent application in which improvement is tried from such a viewpoint.
As described above, in the conventional type recording / reproducing method, stream data in a period since a recording initiation command is issued until the next sequence header emerges is not only normally reproduced even if the stream data is recorded but there is a problem that time loss occurs until normal reproduction is enabled.

Method used

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  • Picture recorder/reproducer and method thereof
  • Picture recorder/reproducer and method thereof

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first embodiment

[0032]FIG. 2 is a block diagram showing the configuration of a recorder / reproducer equivalent to the invention and FIG. 3 explains data processing in this embodiment. The recorder / reproducer in this embodiment is substantially composed of a parabolic antenna 2, a digital satellite broadcasting receiving board 6, a bus arbiter 7, CPU 8, a system memory 9, a storage device 10, graphics 11, a frame buffer 12, a sound processor 13 and an internal bus 14 as shown in FIG. 2. Further, the digital satellite broadcasting receiving board 6 is composed of a tuner unit 15, a descrambling unit 16 and a PID filter 17.

[0033]The digital satellite broadcasting receiving board 6 is mounted inside the personal computer 3, is controlled by CPU 8 via the internal bus 14, processes a radio wave from the satellite received via the parabolic antenna 2 and outputs a picture signal and an aural signal.

[0034]In the digital satellite broadcasting receiving board 6, the tuner unit 15 demodulates a radio wave re...

second embodiment

[0057]FIG. 4 is an explanatory drawing for explaining data processing in a recorder / reproducer equivalent to the invention.

[0058]The whole configuration of the recorder / reproducer equivalent to this embodiment is different from that in the first embodiment only in that a system memory 9A is provided in place of the system memory 9 shown in FIG. 2 in the first embodiment.

[0059]Referring to FIG. 4, the features of a program stored in the system memory 9A in this embodiment will be described below. The configuration and feature of a parabolic antenna 2, a digital satellite broadcasting receiving board 6 and a storage device 10 respectively shown in FIG. 4 are similar to those in the embodiment shown in FIG. 2.

[0060]A program for realizing a recording / reproducing feature in the system memory 9A is composed of a program information management division 24, a recording / reproducing management division 25A, a data control division 26 and an MPEG2 decoder 27. Of these, the features of the pro...

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Abstract

According to the invention, as received stream data is analyzed a sequence header is retrieved and stream data after the detected sequence header is written to storage unit when a recording initiation command is received, a recorded file is generated with a sequence header having image format information required to reproduce stream data immediately after the recording initiation command at the head. As when a reproducing command is received, stream data after the sequence header is read from the storage unit and an image and voice are reproduced, the recorded stream data can immediately normally reproduced without delay and therefore, data acquired by recording stream data used for digital broadcasting and others can be smoothly reproduced.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a picture recorder / reproducer and a method for recording stream data composed of compressed video / voice information and reproducing images and voice from recorded stream data.[0003]2. Description of the Related Art[0004]Digital broadcasting is started and has been able to be received by a personal computer. The capacity of a hard disk mounted in a personal computer has also increased. Then, it is conceivable that the opportunity to record and reproduce stream data used for digital broadcasting utilizing a personal computer will be increased in future.[0005]In case stream data used for digital broadcasting is recorded, it is possible to record stream data in a storage device such as a hard disk since a user issues a recording initiation command.[0006]When stream data is reproduced, data after a sequence header is normally reproduced by referring to the sequence header having image format ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G11B20/10H04N7/00H04N5/937H04N5/91H04N5/92H04N5/00H04N5/76H04N5/781H04N9/804H04N21/426H04N21/433H04N21/434H04N21/454
CPCH04N5/76H04N21/42615H04N21/42661H04N21/4334H04N21/434H04N21/454H04N5/781H04N9/8042
Inventor SHIGAKI, SATOMI
Owner RPX CORP
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